CN203456558U - Charge and discharge maintaining system of middle-capacity maintenance-free storage battery - Google Patents

Abstract

The utility model discloses a charge and discharge maintaining system of a middle-capacity maintenance-free storage battery. The voltage, current and surface temperature of the storage battery are collected, the running state of the storage battery is analyzed according to the collected data so as to prevent excessive charging or excessive discharging of the storage battery, thereby prolonging the service life of the storage battery and saving the cost.

Description

A kind of charge and discharge maintenance system of middle capacity maintenance free cell

Technical field

The utility model relates to the maintenance of storage battery, particularly a kind of charge and discharge maintenance system of middle capacity maintenance free cell.

Background technology

The switchgear of support power distribution automation function, distribution terminal Monodispersed are on each wide distribution line, the electric energy that its electric operating and equipment operation need is provided by voltage transformer when distribution line has electricity, distribution line is provided by back-up source during without electricity, because electric operating needs, energy is large and installing space is limited, One's name is legion, therefore generally select in power distribution automation field at present, has large, the lower-cost non-maintaining middle capacity lead acid accumulator of Energy Efficiency Ratio as its back-up source.

But the operation maintenance of non-maintaining middle capacity lead acid accumulator is along with promoting the use of of power distribution automation also has its disadvantageous one side, as:

Storage battery is arranged on outdoor, and its running environment is severe, and operating temperature changes with season, Changes in weather, high low temperature vary within wide limits;

Charge in batteries mode simple changeless constant current, constant voltage, the activation methods of realizing by integrated chip in power module that adopt, fail to make best control according to battery practical operation situation, thereby cause over-charging of battery more;

Storage battery, when there is no AC power input, has electricity just to put, and causes battery to be crossed and puts.

Because controller switching equipment disperses to install on region, distribute extensively, measure greatly, O&M configuration personnel are few again, cause storage battery operation monitoring difficulty, Maintenance Difficulty etc., make the storage battery actual motion life-span much smaller than designed life.After battery service difficulty, inefficacy, cannot find in time again, thereby had influence on the practical popularization of power distribution automation, monitor rationally and effectively charge and discharge process and the assessment to battery health situation of storage battery, the useful life that extends storage battery is significant to improving distribution reliability.

Summary of the invention

For addressing the above problem, the purpose of this utility model is to provide a kind of charge and discharge maintenance system of middle capacity maintenance free cell, prevents battery overdischarge or overcharges, and extends the life-span of storage battery.

The technical scheme that the invention for solving the technical problem adopts is:

A charge and discharge maintenance system for middle capacity maintenance free cell, comprising:

Data acquisition module, is connected with storage battery is electric, for gathering voltage, electric current and the surface temperature of storage battery;

Logic processing control module, with data acquisition module electrical connection, for receiving voltage, electric current and the surface temperature data of the storage battery of data collecting module collected, and according to the data that receive, generates corresponding control parameter;

Feedback control module, is connected with logic processing control module and storage battery are electric, the control parameter generating for receiving described logic processing control module, and according to size and the direction of controlling the voltage and current that parameter adjustment is relevant to storage battery;

Direct current input module, with feedback control module electrical connection, is used to storage battery that charging current is provided.

Described system also comprises:

Data communication module, with logic processing control module electrical connection, the control parameter of the data that receive for receive logic processing and control module and generation, and is sent to corresponding receiving equipment by wired or wireless mode by the data that receive and control parameter.

The beneficial effects of the utility model are:

The utility model adopts a kind of charge and discharge maintenance and system of middle capacity maintenance free cell, gather voltage, electric current and the surface temperature of storage battery, according to these data that gather, the running status of storage battery is analyzed, prevent overcharge of a battery or overdischarge, thereby extend the working life of storage battery, cost-saving.

Accompanying drawing explanation

Below in conjunction with accompanying drawing and example, the utility model is described in further detail.

Linear schematic diagram when Fig. 1 is this practical storage battery constant voltage constant current charging;

Fig. 2 is this practical described system configuration composition frame chart.

Embodiment

When storage battery is charged, shown in Fig. 1, that A point from figure charges by constant current to storage battery at first, follow the carrying out of charging, the voltage of storage battery rises, when its voltage reaches B point, carry out constant voltage charge, time row along with charging, the electric current of storage battery reduces gradually, ultimate current reduces to C point and becomes micro-electric current, the size of current that now C is ordered is about 0.01C, in the middle of useful application, when the charging current of storage battery is less than 0.01C, being considered as battery has charged, if now still continue long-time charging with primary voltage, cause and overcharge, the life-span of battery will be lost.Meanwhile, the variation of accumulator meter surface temperature also can impact the life-span of storage battery, and this practicality is in conjunction with practical application, solution is overcharged and the impact of temperature on the life of storage battery, extend the life-span of storage battery, reduce storage battery and change number of times, reduce corresponding power equipment cost.

With reference to the block diagram of system shown in Fig. 2, described system comprises:

Data acquisition module, is connected with storage battery is electric, for gathering voltage, electric current and the surface temperature of storage battery;

Logic processing control module, with data acquisition module electrical connection, for receiving voltage, electric current and the surface temperature data of the storage battery of data collecting module collected, and according to the data that receive, generates corresponding control parameter;

Feedback control module, is connected with logic processing control module and storage battery are electric, the control parameter generating for receiving described logic processing control module, and according to size and the direction of controlling the voltage and current that parameter adjustment is relevant to storage battery;

Direct current input module, with feedback control module electrical connection, is used to storage battery that charging current is provided;

Data communication module, with logic processing control module electrical connection, the control parameter of the data that receive for receive logic processing and control module and generation, and is sent to corresponding receiving equipment by wired or wireless mode by the data that receive and control parameter.Described data communication module can be realized accumulator monitoring information and upload and the functions such as Long-distance Control storage battery activation.

When to charge in batteries, the voltage U o of data collecting module collected storage battery, electric current I o and surface temperature T, after logic processing control module receives, according to following steps to data analysis:

(1) detect battery tension Uo and surface temperature T thereof, if Uo is greater than float charge voltage Uf, the voltage during point of C shown in Fig. 1, enters step (4), otherwise, enter step (2);

(2) storage battery is carried out to constant current charge, in charging, if when the accumulator voltage Uo detecting reaches set point U1, the voltage during point of B shown in Fig. 1, enters step (3);

(3) with constant voltage U2, storage battery is charged, according to the surface temperature T of the storage battery detecting, adjust the size of constant voltage U2 simultaneously, when charging process meets when condition is set, enter step (4);

(4) to float, abandon voltage U f storage battery is carried out to floating charge, according to the surface temperature T of the storage battery detecting, adjust the size of float charge voltage Uf simultaneously.

In described step (3), the size of adjusting constant voltage U2 according to the surface temperature T of the storage battery detecting is specially: when surface temperature T is more than or equal to 5 ℃ and while being less than or equal to 35 ℃, keep constant voltage U2 size constant; When surface temperature T is greater than 0 ℃, be less than 5 ℃ or be greater than 35 ℃ while being less than 40 ℃, voltage U 2 is with formula U2=U2-K(T-20 ℃) V changes, the coefficient that wherein K is storage battery.Set temperature value is to set according to concrete practical application herein, and 20 ℃ of optimum temperature value that are battery-operated are take in practical application, when the surface temperature of storage battery is when changing up and down for 20 ℃, according to different situations, needs to adjust the size of charging voltage.At present, storage battery carries out constant-voltage charge with the mono-lattice of 2.40～2.50V/ (20 ℃ time set point), magnitude of voltage U2=28.8V during storage battery constant voltage charge, take 20 ℃ as being middle boundary, change up and down 15 ℃, the surface temperature T of storage battery is more than or equal to 5 ℃ and while being less than or equal to 35 ℃, the surface temperature that storage battery is described is normal, with constant voltage, 28.8V charges, otherwise, if surface temperature T is greater than 0 ℃ and is less than 5 ℃ or be greater than 35 ℃ while being less than 40 ℃, the temperature that storage battery is described has been unfavorable for continuing constant voltage charge, take 20 ℃ as starting point, every variation is the mono-lattice of charging voltage adjustment-4mV/ once, adjust the value of charging voltage U2, making it with formula U2=U2-K(T-20 ℃) V changes, conventionally K value is 0.48, therefore, U2=28.8-0.48(T-20 ℃) V.When storage battery is carried out to constant voltage charge, if the electric current I o of storage battery detected, be less than 0.01C, illustrate that storage battery has charged, need to proceed to floating charge, enter step (4); In practical application, if when the increase value of the voltage U o that the time t of constant voltage charge is greater than set point Tzd or storage battery within the unit interval is greater than set point Δ Uzd, show that equally charge in batteries completes, need to proceed to step (4) and enter the floating charge stage.

In described step (4), conventionally float charge voltage Uf charges with the mono-lattice of 2.275V/ (20 ℃ time set point), the surface temperature T of storage battery is below 0 ℃ or more than 40 ℃ time, need revise charging voltage, take 20 ℃ as starting point, every variation once, cell tension variation-3mV,, when surface temperature T is more than or equal to 0 ℃ and while being less than or equal to 40 ℃, keep the size of float charge voltage Uf constant, with 28.8V, charge; When surface temperature T is less than 0 ℃ or while being greater than 40 ℃, stop charging, now charging voltage is 0V.

Logic processing module, when analyzing, when meeting a certain step, generates the corresponding parameter of controlling, and feedback control module can, according to voltage or the electric current of controlling parameter adjusting storage battery, prevent the generation of accumulator super-charge electrical phenomena.

When battery discharging, the voltage U o of data collecting module collected storage battery, electric current I o and surface temperature T, after Logic control module receives to these data analysis, generate corresponding control parameter simultaneously, feedback control module determines whether to disconnect or recover the discharge loop of storage battery according to control parameter, prevent the generation of battery overdischarge, concrete steps are as follows:

If meeting, surface temperature T is less than-15 ℃ or while being greater than the condition of 50 ℃, the discharge loop of automatic disconnection storage battery, when surface temperature T does not meet above-mentioned condition, recovers discharge loop automatically; Or if electric current I o is greater than short circuit current set point Idl and the duration is greater than set point Tdl, automatic disconnection discharge loop, now illustrates and need to detect storage battery, needs manually to recover discharge loop; Or, if voltage U o is less than the highest critical value Ulj and the electric current I o of setting, be less than short circuit current definite value Idl, automatic disconnection discharge loop.Because storage battery needs to consume the long period in transportation installation process, if battery discharging in whole process, can cause battery overdischarge, therefore, this practicality is in storage battery transportation installation process, disconnect discharge loop, only, after storage battery installation, manually recovered discharge loop.

This practicality is by the detection to battery tension, electric current and surface temperature, discharging and recharging of storage battery safeguarded, prevent from overcharging and the impact that cause of overdischarge on storage battery, extend the useful life of storage battery, reduce the replacement frequency of storage battery, save relevant cost.

The above, be preferred embodiment of the present utility model, and the utility model is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present utility model with identical means, all should belong to protection range of the present utility model.

Claims (2)

1. in, a charge and discharge maintenance system for capacity maintenance free cell, is characterized in that, comprising:

Data acquisition module, is connected with storage battery is electric, for gathering voltage, electric current and the surface temperature of storage battery;

Logic processing control module, with data acquisition module electrical connection, for receiving voltage, electric current and the surface temperature data of the storage battery of data collecting module collected, and according to the data that receive, generates corresponding control parameter;

Feedback control module, is connected with logic processing control module and storage battery are electric, the control parameter generating for receiving described logic processing control module, and according to size and the direction of controlling the voltage and current that parameter adjustment is relevant to storage battery;

Direct current input module, with feedback control module electrical connection, is used to storage battery that charging current is provided.

2. system according to claim 1, is characterized in that, also comprises:

Data communication module, with logic processing control module electrical connection, the control parameter of the data that receive for receive logic processing and control module and generation, and is sent to corresponding receiving equipment by wired or wireless mode by the data that receive and control parameter.

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